CN101960843B - Image processing method, image processing device, and image processing program - Google Patents

Image processing method, image processing device, and image processing program Download PDF

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Publication number
CN101960843B
CN101960843B CN200980107175.XA CN200980107175A CN101960843B CN 101960843 B CN101960843 B CN 101960843B CN 200980107175 A CN200980107175 A CN 200980107175A CN 101960843 B CN101960843 B CN 101960843B
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interpolation reliability
interpolation
reliability
pixel
value
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CN101960843A (en
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户田真人
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NEC Corp
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NEC Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
    • H04N7/012—Conversion between an interlaced and a progressive signal

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Abstract

Disclosed is an image-processing method that determines the interpolation reliability for interpolated pixels in a progressive image, generated by interpolation of an interlaced image, by combining at least any of a first interpolation reliability determined based on the absolute value of the difference between pixels in an upper line and pixels in a lower line used to calculate the value of the interpolated pixels, a second interpolation reliability determined based on the width of the region used to determine the pixels in the upper line and the pixels in the lower line used to calculate the value of the interpolated pixels, and a third interpolation reliability determined by combining the change in luminance for the upper line and the change in luminance for the lower line within the region.

Description

Image processing method, image processing apparatus and image processing program
Technical field
The present invention relates to utilize that interlacing-conversion generates image processing method, image processing apparatus and the image processing program of progressive picture line by line.
Background technology
Mostly the image of playing the image that transmits and being stored in recording mediums such as video tape, DVD through TV is the interlacing image.So-called interlaced picture Fi is that Fp compares with progressive picture suc as formula (1) represented that kind, the image that on the scanning direction of image, is interrupted in every line.
(formula 1)
Fi ( x , y ) = Fp ( x , y ) If ( y Mod 2 = 0 ) Null Else Or
Fi ( x , y ) = Fp ( x , y ) if ( y mod 2 = 1 ) Null else · · · · · · ( 1 )
Here, Fi (x, y) and Fp (x y) is coordinate (x, the Fi that y) locates and the pixel value of Fp.In addition, x mod y is the arithmetic mark of the remainder when representing x divided by y.
Utilizing LCD, plasma scope etc. to show that the image display device of progressive picture shows under the situation of interlaced picture; And the situation of discerning input interlaced picture in the image comparison device of input progressive picture in that progressive picture of being imported and the progressive picture that is stored in database are in advance compared is inferior, and the Null pixel of the row that need be interrupted in the interlaced picture of recovery formula (1) through interpolation generates progressive picture.This interpolation is handled and is commonly referred to as interlacing-conversion (IP conversion/elimination interlacing) line by line.Below will be called inter polated pixel through the Null pixel that interpolation is restored.
As one of method of IP conversion, have that (x1, the method for its neighboring pixel information is used in the interpolation of Null pixel y1) to the coordinate in the Fi.As this method, have by the simple linear interpolating method of formula (2) expression, by the peripheral adjustment type interpolating method (non-patent literature 1, patent documentation 1) of formula (3) expression etc.Wherein, Fp2 is the image line by line that utilizes said interpolating method to generate, and (x y) is coordinate (x, the pixel value of the Fp2 that y) locates to Fp2.In addition, the m in the formula (3) makes formula (4) be minimum p in the scope that is predetermined .Below, (φ≤p≤φ) be called the hunting zone is called the hunting zone signals with numerical value φ with scope.
In addition, in non-patent literature 2, through the brightness transition of neighboring pixel, the brightness of the up-downgoing in the hunting zone of the peripheral adjustment type interpolating method of each inter polated pixel is changed that kind as shown in Figure 7 be divided into following 5 kinds of patterns: (1) one side is smooth; (2) dull increase/minimizing on same direction; (3) to same direction protrusion; (4) one side's increase/minimizings and the opposing party protrusion; (5) other and changes hunting zone signals φ rightly, and any such maximum magnitude that the pattern that makes the brightness of the up-downgoing in the scope change becomes the pattern from (1) to (4) becomes the hunting zone.The pattern that the brightness of the up-downgoing in the hunting zone that below will be classified changes is called the brightness changing pattern of up-downgoing.
(formula 2)
Fp 2 ( x 1 , y 1 ) = Fi ( x 1 , y 1 - 1 ) + Fi ( x 1 , y 1 + 1 ) 2 · · · · · · ( 2 )
(formula 3)
Fp 2 ( x 1 , y 1 ) = Fi ( x 1 - m , y 1 - 1 ) + Fi ( x 1 + m , y 1 + 1 ) 2 · · · · · · ( 3 )
(formula 4)
Sub(p)＝|Fi(x1-p，y1-1)-Fi(x1+p，y+1)| ……(4)
In the IP conversion, generally be difficult to the whole Null pixels of interpolation correctly.That is, mean in the progressive picture that generates through IP conversion and comprise the pixel (following pixel with interpolation is called inter polated pixel) that misplugs benefit.
In image processing application apparatus such as the image display that utilizes such progressive picture, image comparison device, exist by being contained in mispluging in the progressive picture and mend the problem that handling property that pixel causes descends.In order to prevent this problem, in described method, to each inter polated pixel, calculate the interpolation reliability, and in the image processing of said that kind is used, carry out and the corresponding image processing of this interpolation reliability according to the difference absolute value of the pixel value that in interpolation, utilizes.Below, the difference absolute value of the pixel that will in this interpolation, utilize is called the interpolation difference value.
For example; In order to show the such quilt of patent documentation 2 progressive picture of interpolation more accurately; Carrying out motor fitness type IP conversion, promptly using quiet moving differentiation, will carry out the switching of processing as an index according to the interpolation reliability that said interpolation difference value calculates to utilizing said method from the image processing application apparatus that progressive picture and other interlaced picture constantly of a width of cloth interlaced picture interpolation of present moment synthesizes.Said interpolation reliability is calculated with the more little then interpolation reliability of interpolation difference value mode bigger, that the bigger then interpolation reliability of interpolation difference value is more little.
Use Fig. 9 to the IP conversion generation progressive picture of utilizing the technology that is associated with the present invention and export progressive picture and the image processing apparatus of interpolation reliability describes.Fig. 9 is the block diagram of structure that expression utilizes the technology be associated with the present invention to carry out the generation of progressive picture and carry out the image processing apparatus of its interpolation calculation of reliability.
The image processing apparatus 100 of Fig. 9 comprises picture interpolation unit 11 and interpolation reliability computing unit 12, is input with the interlaced picture, to image processing application apparatus such as image display, image comparison device 400 output progressive picture and interpolation reliabilitys thereof.
Picture interpolation unit 11 is input with the interlaced picture, utilizes said method that interlaced picture is carried out interpolation, generates progressive picture and exports the interpolation difference value of each pixel.
Interpolation reliability computing unit 12 is input with the interpolation difference value of each pixel of 11 outputs from the picture interpolation unit, calculates and the corresponding interpolation reliability of interpolation difference value output interpolation reliability.
Patent documentation 1: japanese kokai publication hei 4-355581 communique
Patent documentation 2: TOHKEMY 2000-50212 communique
Non-patent literature 1: " Deinterlacing-an overview ", De Haan, G., Bellers, E.B, Proceedings of the IEEE, Volume 86, and Issue 9, Sept.1998 Page (s): 1839-1857
Non-Patent Document 2: "Surrounding areas Full Brightness Changes ni base づ ku Oh boots zip Adaptive type イ nn Tatari a Ritz a su - pu ro bag Ritz boots Shin sleeve Energy Conversion Act," Toda ら, 6th Forum on Information Technology フ Io a ra Rousseau, I-034, 2007
Summary of the invention
But,, only use the information of interpolation difference value can not correctly ask for the interpolation reliability though described corresponding technology uses the interpolation difference value to calculate the interpolation reliability.
For example; The inter polated pixel of gazing at shown in the epimere of Fig. 8 is made pixel up and down connect as Fig. 8 hypomere and carries out under the situation of white interpolation and black pixel on the incline direction is connected to each other and deceives under the situation of interpolation; No matter which kind of situation; The interpolation difference value is 0, and consequently, the interpolation reliability is maximum.But under the situation of the connection of consideration of regional, under the situation of white interpolation, the top-right black picture element of inter polated pixel is isolated, and is therefore imappropriate.The interpolation reliability of gazing at inter polated pixel of therefore preferably carrying out under the situation of white interpolation is compared with the interpolation reliability of gazing at inter polated pixel under the situation of deceiving interpolation, has littler value.But, if, utilize said corresponding technology, then no matter carry out which kind of interpolation only according to the interpolation difference value, its interpolation reliability is identical maximum.Therefore, under the situation of using said corresponding technology, there is the situation of the handling property deterioration of image processing application apparatus.
Like this, when utilizing said corresponding technology, because had problems, so the handling property of image processing application apparatus existing problems can not provide preferable image processing method, image processing apparatus and image processing program by in the interpolation reliability that calculates.
Therefore, the present invention invents in view of said problem, and its purpose is to provide a kind of image processing method, image processing apparatus and image processing program that calculates the interpolation reliability of interlacing-when changing line by line accurately.
The present invention who addresses the above problem provides a kind of image processing method; It is characterized in that: through in the first interpolation reliability, the second interpolation reliability and the 3rd interpolation reliability at least one is comprehensive; Decide interpolation reliability through the inter polated pixel that interlaced picture is carried out the progressive picture that interpolation generates; Wherein, The first interpolation reliability decides according to the difference absolute value of pixel that use, up in the calculating of the value of the pixel of carrying out interpolation and descending pixel; The second interpolation reliability according to employed in the calculating of the value of the pixel of carrying out interpolation, for the width that determines the zone that up pixel and descending pixel are used decides, the 3rd interpolation reliability changes the combination that changes with descending brightness according to the up brightness in the said zone and decides.
The present invention who addresses the above problem provides a kind of image processing method, it is characterized in that, has:
The picture interpolation step in this step, is carried out interpolation to interlaced picture and is generated progressive picture;
The first interpolation reliability calculation procedure, the inter polated pixel that the difference absolute value according to up pixel of in the calculating of the value of the pixel of carrying out interpolation, using and descending pixel is decided the first interpolation reliability calculate;
At least one step in the second interpolation reliability calculation procedure and the 3rd interpolation reliability calculation procedure; Wherein, The second interpolation reliability calculation procedure is to calculating according to the second interpolation reliability of the inter polated pixel that in the calculating of the value of said pixel of carrying out interpolation, uses, decide for the width that determines the zone that up pixel and descending pixel are used, and the 3rd interpolation reliability calculation procedure is calculated the 3rd interpolation reliability of the inter polated pixel that the pattern that changes the combination that changes with descending brightness according to the up brightness in the said zone decides; With
The comprehensive step of interpolation reliability, in the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability at least one is comprehensive, and calculate the interpolation reliability of inter polated pixel.
The present invention who addresses the above problem provides a kind of image processing apparatus, it is characterized in that, has:
The first interpolation reliability computing unit, the first interpolation reliability of the inter polated pixel that the difference absolute value according to up pixel of in the calculating of the value of the inter polated pixel of the progressive picture that generates through the interpolation interlaced picture, using and descending pixel is decided is calculated;
At least one unit in the second interpolation reliability computing unit and the 3rd interpolation reliability computing unit; Wherein, The second interpolation reliability computing unit is to calculating according to the second interpolation reliability of the inter polated pixel that in the calculating of the value of the pixel of said interpolation, uses, decide for the width that determines the zone that up pixel and descending pixel are used, and the 3rd interpolation reliability computing unit calculates the 3rd interpolation reliability of the inter polated pixel that the pattern that changes the combination that changes with descending brightness according to the up brightness in the said zone decides; With
Interpolation reliability comprehensive unit, in the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability at least one is comprehensive, and calculate the interpolation reliability of inter polated pixel.
The present invention who addresses the above problem provides a kind of program, it is characterized in that, makes information processor carry out following the processing:
The first interpolation reliability computing, the first interpolation reliability of the inter polated pixel that the difference absolute value according to up pixel of in the calculating of the value of the inter polated pixel of the progressive picture that generates through the interpolation interlaced picture, using and descending pixel is decided is calculated;
At least one processing in the second interpolation reliability computing and the 3rd interpolation reliability computing; Wherein, The second interpolation reliability computing is to calculating according to the second interpolation reliability of the inter polated pixel that in the calculating of the value of the pixel of said interpolation, uses, decide for the width that determines the zone that up pixel and descending pixel are used, and the 3rd interpolation reliability computing is calculated the 3rd interpolation reliability of the inter polated pixel that the pattern that changes the combination that changes with descending brightness according to the up brightness in the said zone decides; With
The integrated treatment of interpolation reliability, in the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability at least one is comprehensive, and calculate the interpolation reliability of inter polated pixel.
The effect of invention
The present invention has the effect of the interpolation reliability that can calculate interlacing-when changing line by line accurately.
Description of drawings
Fig. 1 is the block diagram of structure of the best mode of expression first invention that is used for embodiment of the present invention.
Fig. 2 is the block diagram of detailed structure of the interpolation reliability computing unit 22 of expression first invention of the present invention.
Fig. 3 is the flow chart of the action of the expression best mode that is used to implement first invention.
Fig. 4 is the block diagram of structure of the best mode of expression second invention that is used for embodiment of the present invention.
Fig. 5 is the block diagram of detailed structure of the interpolation reliability computing unit 32 of expression second invention of the present invention.
Fig. 6 is the flow chart of the action of the expression best mode that is used to implement the 4th invention.
Fig. 7 is the key diagram of the brightness changing pattern of expression up-downgoing.
Fig. 8 is the additional figure that is used to explain the problem points of corresponding technology.
Fig. 9 is the block diagram of the structure of expression corresponding technology.
The explanation of Reference numeral
100 image processing apparatus based on existing method
11 picture interpolation unit
12 interpolation reliability computing units
The image processing apparatus of 200 first execution modes of the present invention
21 picture interpolation unit
22 interpolation reliability computing units
221 first interpolation reliability computing units
222 second interpolation reliability computing units
223 the 3rd interpolation reliability computing units
224 interpolation reliability comprehensive units
The image processing apparatus of 300 second execution modes of the present invention
32 interpolation reliability computing units
324 interpolation reliability comprehensive units
400 image processing application apparatus
500 user interfaces
Embodiment
(first execution mode)
With reference to accompanying drawing first execution mode of the present invention is elaborated.
Fig. 1 is the block diagram of first execution mode of expression image processing apparatus of the present invention.With reference to Fig. 1, the image processing apparatus 200 of first execution mode of the present invention comprises picture interpolation unit 21 and interpolation reliability computing unit 22.
Picture interpolation unit 21 is input with the interlaced picture, uses the method for non-patent literature 2 grades to generate progressive picture., utilize the method for non-patent literature 2 here, the brightness change calculations peripheral according to inter polated pixel goes out the brightness changing pattern of up-downgoing, tries to achieve execution peripheral adjustment type interpolation behind the best hunting zone.Picture interpolation unit 21 is except the output of exporting related method, promptly by the interpolation difference value of the progressive picture of interpolation and each inter polated pixel, also exports the brightness changing pattern and the hunting zone of the up-downgoing of each inter polated pixel that the method for utilizing non-patent literature 2 asks for.
Interpolation reliability computing unit 22 is input with the brightness changing pattern of the up-downgoing in interpolation difference value, hunting zone and the hunting zone of each inter polated pixel, calculates and export the interpolation reliability of each inter polated pixel.With reference to Fig. 2, interpolation reliability computing unit 22 comprises the first interpolation reliability computing unit 221, the second interpolation reliability computing unit 222, the 3rd interpolation reliability computing unit 223 and interpolation reliability comprehensive unit 224.
The first interpolation reliability computing unit 221 is input with the interpolation difference value of each inter polated pixel, calculates and export the first interpolation reliability that means the interpolation reliability according to the interpolation difference value.With regard to the action of the first interpolation reliability computing unit 221; Utilize the method identical with the interpolation reliability computing unit of corresponding technology 12; The more little then output of interpolation difference value has the first interpolation reliability of big more value; The bigger then output of interpolation difference value has the first interpolation reliability of more little value, gets final product like this.
An example to the first interpolation calculation of reliability method describes.Now, about inter polated pixel (x2, y2), as (x2, (calculating formula shown in the use formula (5) is calculated for x2, method y2) y2) to ask for the first interpolation reliability p1 according to interpolation difference value s.
(formula 5)
p 1 ( x 2 , y 2 ) = ( 1 - p 10 ) T 1 - s ( x 2 , y 2 ) T 1 + p 10 if ( s ( x 2 , y 2 ) ≤ T 1 ) p 10 else · · · · · · ( 5 )
Here, T1 and p10 (0≤p10≤1.0) are in advance through the manual parameter that is provided with.
Further, can also utilize following method: prepare in advance and make interpolation difference value and the corresponding table of the first interpolation reliability, the interpolation difference value s that reference table is read and imported (x2, y2) the first interpolation reliability of correspondence.
The second interpolation reliability computing unit 222 is described.
Interlaced picture is being carried out under the situation of interpolation, meaning with wide hunting zone execution peripheral adjustment type interpolation and use more information to carry out interpolation, meaning with narrow hunting zone execution peripheral adjustment type interpolation and use less information to carry out interpolation.For example, in the peripheral adjustment type interpolation of the method for non-patent literature 2, carry out the interpolation of peripheral adjustment type with wide hunting zone and have following character: the brightness of inter polated pixel periphery changes relatively more dull, carries out correct interpolation easily; In addition, under the situation of narrow hunting zone, the brightness of inter polated pixel periphery changes complicated, difficult to carry out correct interpolation.That is, we can say that carry out in wide hunting zone under the situation of interpolation processing, its interpolation reliability is high, carries out in narrow hunting zone under the situation of interpolation processing, its interpolation reliability is low.
Therefore; In the present invention; Be conceived to the size of this hunting zone and the characteristic that there is close association in the interpolation reliability; With regard to the second interpolation reliability computing unit 222, the wide more then output in the hunting zone of input has the second interpolation reliability of big more value, and the narrow more then output in the hunting zone of input has the second interpolation reliability of more little value.
About inter polated pixel (x2, y2), the calculating formula shown in the use formula (6), according to inter polated pixel (x2, hunting zone signals φ y2) (x2, y2) calculate the second interpolation reliability p2 (x2, y2).
(formula 6)
p 2 ( x 2 , y 2 ) = ( 1 - p 20 ) φ ( x 2 , y 2 ) T 2 + p 20 if ( φ ( x 2 , y 2 ) ≤ T 1 ) 1.0 else · · · · · · ( 6 )
Here, T2 and p20 (0≤p20≤1.0) are in advance through the manual parameter that is provided with.
Further, can also utilize following method: prepare in advance and make hunting zone and the corresponding table of the second interpolation reliability, the hunting zone φ that reference table is read and imported (1x2, y2) the second interpolation reliability of correspondence.
The 3rd interpolation reliability computing unit 223 is changed to input with the brightness of the up-downgoing in the hunting zone of each inter polated pixel, and the interpolation reliability that output calculates according to said brightness changing pattern is the 3rd interpolation reliability.
Interlaced picture is being carried out under the situation of interpolation, the brightness of inter polated pixel periphery changes the more dull just easier correct interpolation of carrying out, and the brightness of inter polated pixel periphery changes the more complicated correct interpolation that just is difficult to carry out more.In addition, have following characteristic: the mode that the brightness of up-downgoing changes is similar more, the correct interpolation of just easier execution, and the brightness of up-downgoing changes more different, just is difficult to carry out correct interpolation more.
Therefore; In the present invention; There is related characteristic in the brightness changing pattern that is conceived to this up-downgoing with the interpolation reliability; At the 3rd interpolation reliability computing unit 223; The brightness changing pattern of with good grounds up-downgoing, for the pattern that four brightness of in Fig. 7, being classified change, output device has the 3rd interpolation reliability of following value: (the 3rd interpolation reliability a when side is smooth) >=when dull increase/minimizing (on same direction the 3rd interpolation reliability) >=(the 3rd interpolation reliability when same direction is protruded) >=(the interpolation reliability when side's increase/minimizing the opposing party is protruded).
About inter polated pixel (x2; Y2), (x2 y2) asks for the 3rd interpolation reliability p3 (x2 as the brightness changing pattern k according to up-downgoing; Y2) one of method; Prepare the brightness changing pattern and the corresponding table of the 3rd interpolation reliability that make up-downgoing in advance, the brightness changing pattern k of the up-downgoing that reference table is read and imported (1x2, y2) the 3rd interpolation reliability of correspondence.In addition, the brightness changing pattern of up-downgoing and the corresponding table of the 3rd interpolation reliability also can be adjusted from the outside.
Interpolation reliability comprehensive unit 224 is being input from the said first interpolation reliability of the said first interpolation reliability unit 221 output, from the said second interpolation reliability of the said second interpolation reliability unit, 222 outputs with from the said three interpolation reliabilitys of said the 3rd interpolation reliability unit 223 outputs; Calculate the interpolation reliability, with of the output of this interpolation reliability as interpolation reliability unit 22.
As (x2 y2) asks for interpolation reliability p (x2, one of method y2) for inter polated pixel; Use (x2, and first interpolation reliability p1 y2) (x2, y2), (x2; Y2) (x2 is y2) with (x2, the 3rd interpolation reliability p3 (x2 y2) for the second interpolation reliability p2; Y2), utilize formula (7) to ask for.
(formula 7)
p(x2，y2)＝p1(x2，y2)p2(x2，y2)p3(x2，y2) ……(7)
In addition, also can suc as formula the calculating formula that kind of (8) utilize p1 (x2, y2), p2 (x2, y2) and p3 (x2, weighted average y2) is asked for.
(formula 8)
p ( x 2 , y 2 ) = w 1 p 1 ( x 2 , y 2 ) + w 2 p 2 ( x 2 , y 2 ) + w 3 p 3 ( x 2 , y 2 ) w 1 + w 2 + w 3 · · · · · · ( 8 )
Here, w1, w2, w3 are the synthetic weight coefficients of real number, both can be predefined fixed values, also can adjust from the outside.
Shown in above, image processing apparatus 200 is input with the interlaced picture, is output with progressive picture and interpolation reliability.These outputs become back segment, for example realize the input of the image processing application apparatus 400 etc. of definition conversion.
Then, with reference to the flow chart of Fig. 3, the action of the image processing method of first execution mode of the present invention is described.
The input interlaced picture carries out interpolation and generates progressive picture (step S11) it.
In the first interpolation reliability is calculated, ask for the first interpolation reliability (step S12) according to the interpolation difference value.
In the second interpolation reliability is calculated, ask for the second interpolation reliability (step S13) according to the width of hunting zone.
In the 3rd interpolation reliability is calculated, ask for the 3rd interpolation reliability (step S14) according to the brightness changing pattern of the up-downgoing in the hunting zone.
Then, in the interpolation calculation of reliability, ask for the interpolation reliability (step S15) of gazing at inter polated pixel according to the first interpolation reliability, the second interpolation reliability and the 3rd interpolation reliability.
(second execution mode)
Second execution mode is described.
Fig. 4 is the block diagram of second execution mode of expression image processing apparatus of the present invention.With reference to Fig. 4, the image processing apparatus 300 of second execution mode of the present invention comprises picture interpolation unit 21 and interpolation reliability computing unit 32.The image processing apparatus 300 of second execution mode of the present invention is compared with the image processing apparatus 200 of first execution mode of the present invention, in interpolation reliability computing unit 32 differences.Below specify interpolation reliability computing unit 32.
With reference to Fig. 5, interpolation reliability computing unit 32 comprises the first interpolation reliability computing unit 221, the second interpolation reliability computing unit 222, the 3rd interpolation reliability computing unit 223 and interpolation reliability comprehensive unit 324.Interpolation reliability computing unit 32 is compared with the interpolation reliability computing unit 22 of the image processing apparatus 200 of first execution mode of the present invention; At interpolation reliability comprehensive unit 324, different at " the synthetic weight coefficient from the formula (8) of user interface 500 input interpolation reliability comprehensive units 224 " this respect.
The image processing apparatus 300 of second execution mode of the present invention thus, can easily be regulated synthetic weight coefficient through the setting of the synthetic weight coefficient of user interface 500 execution interpolation reliability comprehensive units 324.
Then, with reference to the flow chart of Fig. 6, the action of the image processing method of second execution mode of the present invention is described.
The input interlaced picture carries out interpolation and generates progressive picture (step S21) it.
In the first interpolation reliability is calculated, ask for the first interpolation reliability (step S22) according to the interpolation difference value.
In the second interpolation reliability is calculated, ask for the second interpolation reliability (step S23) according to the width of hunting zone.
In the 3rd interpolation reliability is calculated, ask for the 3rd interpolation reliability (step S24) according to the brightness changing pattern of the up-downgoing in the hunting zone.
The value of synthetic weight coefficient is set at the value (step S25) by the user interface appointment.
Then, in the interpolation calculation of reliability, ask for the interpolation reliability (step S26) of gazing at inter polated pixel according to the first interpolation reliability, the second interpolation reliability and the 3rd interpolation reliability.
In addition; In first and second execution modes of first and second execution modes of image processing apparatus of the present invention and image processing method of the present invention, also can be only through the comprehensive of the first interpolation reliability and the second interpolation reliability or only comprehensively calculate the interpolation reliability through the first interpolation reliability and the 3rd interpolation reliability.Such execution mode can be realized through following mode; Promptly; Under the comprehensive situation that is merely the first interpolation reliability and the second interpolation reliability; The value that makes the 3rd interpolation reliability in said first and second execution modes is a fixed value 1.0, and under the comprehensive situation that is merely the first interpolation reliability and the 3rd interpolation reliability, the value that makes the second interpolation reliability is a fixed value 1.0.
The first interpolation reliability and the second interpolation reliability are comprehensively being calculated in the method for interpolation reliability; Compare with existing method according to interpolation difference value calculating interpolation reliability; Through increasing the second interpolation reliability according to the width calculating of hunting zone; Information can be used, therefore more high-precision interpolation reliability can be calculated about the easy level of enforcement of the correct interpolation that width had of hunting zone.
In addition; The first interpolation reliability and the 3rd interpolation reliability are comprehensively being calculated in the method for interpolation reliability; Compare with existing method according to interpolation difference value calculating interpolation reliability; Through increasing the 3rd interpolation reliability of calculating according to the brightness changing pattern of the up-downgoing in the hunting zone, the complexity that can change from the brightness of inter polated pixel periphery obtains the information about the easy level of enforcement of correct interpolation, therefore can calculate more high-precision interpolation reliability.
In described execution mode, though by hardware structure diagram as each ones such as interpolation unit 21, interpolation reliability computing units 22,32, also can be by constitute the computer that moves through program control.Computer can be any in central processing unit, processor and the data processing equipment.
As stated; First mode of the present invention is a kind of image processing method; It is characterized in that: through in the first interpolation reliability, the second interpolation reliability and the 3rd interpolation reliability at least one is comprehensive; Decide interpolation reliability through the inter polated pixel that interlaced picture is carried out the progressive picture that interpolation generates; Wherein, The first interpolation reliability decides according to the difference absolute value of employed up pixel in the calculating of the value of the pixel of carrying out interpolation with descending pixel, the second interpolation reliability according to employed in the calculating of the value of the pixel of carrying out interpolation, for the width that determines the zone that up pixel and descending pixel are used decides, the 3rd interpolation reliability decides according to the combination that the up brightness in the said zone changes with descending brightness variation.
Second mode of the present invention is characterised in that: in aforesaid way, through the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability is comprehensive, decide said interpolation reliability.
Third Way of the present invention is characterised in that: in aforesaid way, said difference certainly has big more value to the more little then said first interpolation reliability of value, and the bigger then said first interpolation reliability of said difference absolute value has more little value.
Cubic formula of the present invention is characterised in that: in aforesaid way, the wide more then said second interpolation reliability in said zone has big more value, and the narrow more then said second interpolation reliability in said zone has more little value.
The 5th mode of the present invention is characterised in that: in aforesaid way, the pattern that pattern that said up brightness changes and descending brightness change is similar more, and then said the 3rd interpolation reliability has big more value.
The 6th mode of the present invention is characterised in that: in aforesaid way; The pattern that pattern that said up brightness changes and descending brightness change is simple more; Then said the 3rd interpolation reliability has big more value; The pattern that pattern that said up brightness changes and descending brightness change is more complicated, and then said the 3rd interpolation reliability has more little value.
The 7th mode of the present invention is characterised in that: in aforesaid way; Change the pattern of the combination that changes with descending brightness as the up brightness in the said zone, use following four kinds of patterns: a side is smooth, on same direction, increase or reduce, to same direction protrusion, side's increase or minimizing and the opposing party is protruded.
All directions of the present invention formula is characterised in that: in aforesaid way; With the said first interpolation reliability, with the said second interpolation reliability and said the 3rd interpolation reliability at least one when comprehensive, utilize synthetic weight coefficient through the user interface input.
The 9th mode of the present invention is a kind of image processing method, it is characterized in that having:
The picture interpolation step in this step, is carried out interpolation to interlaced picture and is generated progressive picture;
The first interpolation reliability calculation procedure, in this step, the first interpolation reliability of the inter polated pixel that the difference absolute value according to up pixel of in the calculating of the value of the pixel of carrying out interpolation, using and descending pixel is decided is calculated;
At least one step in the second interpolation reliability calculation procedure and the 3rd interpolation reliability calculation procedure; Wherein, The second interpolation reliability calculation procedure is to calculating according to the second interpolation reliability of the inter polated pixel that in the calculating of the value of said pixel of carrying out interpolation, uses, decide for the width that determines the zone that up pixel and descending pixel are used, and the 3rd interpolation reliability calculation procedure is calculated the 3rd interpolation reliability of the inter polated pixel that the pattern that changes the combination that changes with descending brightness according to the up brightness in the said zone decides; With
The comprehensive step of interpolation reliability, in the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability at least one is comprehensive, calculate the interpolation reliability of inter polated pixel.
The tenth mode of the present invention is characterised in that: in aforesaid way; Carry out said second interpolation reliability calculation procedure and said the 3rd interpolation reliability calculation procedure, the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability is comprehensive.
The 11 mode of the present invention is a kind of image processing apparatus, it is characterized in that, has:
The first interpolation reliability computing unit, the first interpolation reliability of the inter polated pixel that the difference absolute value according to employed up pixel in the calculating of the value of the inter polated pixel of the progressive picture that generates through the interpolation interlaced picture and descending pixel is decided is calculated;
At least one computing unit in the second interpolation reliability computing unit and the 3rd interpolation reliability computing unit; Wherein, The second interpolation reliability computing unit is to calculating according to the second interpolation reliability of the inter polated pixel that in the calculating of the value of said inter polated pixel, uses, decide for the width that determines the zone that up pixel and descending pixel are used, and the 3rd interpolation reliability computing unit calculates the 3rd interpolation reliability of the inter polated pixel that the pattern that changes the combination that changes with descending brightness according to the up brightness in the said zone decides; With
Interpolation reliability comprehensive unit, in the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability at least one is comprehensive, and calculate the interpolation reliability of inter polated pixel.
The 12 mode of the present invention is characterised in that: in aforesaid way; Have said second interpolation reliability computing unit and said the 3rd interpolation reliability computing unit, said interpolation reliability comprehensive unit is comprehensive with the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability.
The 13 mode of the present invention is characterised in that: in aforesaid way; The said first interpolation reliability computing unit calculates the said first interpolation reliability; Make the more little then said first interpolation reliability of said difference absolute value have big more value, the bigger then said first interpolation reliability of difference absolute value has more little value.
The of the present invention the tenth cubic formula is characterised in that: in aforesaid way; The said second interpolation reliability computing unit calculates the said second interpolation reliability; Make the wide more then said second interpolation reliability in said zone have big more value, the narrow more then said second interpolation reliability in said zone has more little value.
The 15 mode of the present invention is characterised in that: in aforesaid way; Said the 3rd interpolation reliability computing unit calculates said the 3rd interpolation reliability; Make pattern that said up brightness changes similar more with the pattern of descending brightness variation, then said the 3rd interpolation reliability has big more value.
The 16 mode of the present invention is characterised in that: in aforesaid way; Said the 3rd interpolation reliability computing unit calculates said the 3rd interpolation reliability; The pattern that makes pattern that said up brightness changes and descending brightness change is simple more; Then said the 3rd interpolation reliability has big more value, and the pattern that pattern that said up brightness changes and descending brightness change is more complicated, and then said the 3rd interpolation reliability has more little value.
The 17 mode of the present invention is characterised in that: in aforesaid way, said the 3rd interpolation reliability computing unit uses following four kinds of patterns to change the pattern of the combination that changes with descending brightness as the up brightness in the said zone: a side is smooth, on same direction, increase or reduce, to same direction protrusion, side's increase or minimizing and the opposing party is protruded.
The tenth all directions formula of the present invention is characterised in that: in aforesaid way; Said interpolation reliability comprehensive unit when comprehensive, is utilizing the synthetic weight coefficient through the user interface input with in the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability at least one.
The 19 mode of the present invention is a kind of program, it is characterized in that, makes information processor carry out following the processing:
The first interpolation reliability computing, the first interpolation reliability of the inter polated pixel that the difference absolute value according to up pixel of in the calculating of the value of the inter polated pixel of the progressive picture that generates through the interpolation interlaced picture, using and descending pixel is decided is calculated;
At least one processing in the second interpolation reliability computing and the 3rd interpolation reliability computing; Wherein, The second interpolation reliability computing is to calculating according to the second interpolation reliability of the inter polated pixel that in the calculating of the value of said inter polated pixel, uses, decide for the width that determines the zone that up pixel and descending pixel are used, and the 3rd interpolation reliability computing is calculated the 3rd interpolation reliability of the inter polated pixel that the pattern that changes the combination that changes with descending brightness according to the up brightness in the said zone decides; With
The integrated treatment of interpolation reliability, in the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability at least one is comprehensive, calculate the interpolation reliability of inter polated pixel.
The 20 mode of the present invention is characterised in that: in aforesaid way; Make information processor carry out said second interpolation reliability computing and said the 3rd interpolation reliability computing, the integrated treatment of said interpolation reliability makes the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability comprehensive.
The 21 mode of the present invention is characterised in that: in aforesaid way; The said first interpolation reliability is calculated in the said first interpolation reliability computing; Make the more little then said first interpolation reliability of said difference absolute value have big more value, the bigger then said first interpolation reliability of difference absolute value has more little value.
The 22 mode of the present invention is characterised in that: in aforesaid way; The said second interpolation reliability is calculated in the said second interpolation reliability computing; Make the wide more then said second interpolation reliability in said zone have big more value, the narrow more then said second interpolation reliability in said zone has more little value.
The 23 mode of the present invention is characterised in that: in aforesaid way; The 3rd interpolation reliability is calculated in said the 3rd interpolation reliability computing; Make pattern that said up brightness changes similar more with the pattern of descending brightness variation, then said the 3rd interpolation reliability has big more value.
The of the present invention the 20 cubic formula is characterised in that: in aforesaid way; Said the 3rd interpolation reliability is calculated in said the 3rd interpolation reliability computing; The pattern that makes pattern that said up brightness changes and descending brightness change is simple more; Then said the 3rd interpolation reliability has big more value, and the pattern that pattern that said up brightness changes and descending brightness change is more complicated, and then said the 3rd interpolation reliability has more little value.
The 25 mode of the present invention is characterised in that: in aforesaid way, said the 3rd interpolation reliability computing uses following four kinds of patterns to change the pattern of the combination that changes with descending brightness as the up brightness in the said zone: a side is smooth, on same direction, increase or reduce, to same direction protrusion, side's increase or minimizing and the opposing party is protruded.
The 26 mode of the present invention is characterised in that: in aforesaid way; The integrated treatment of said interpolation reliability when comprehensive, is utilizing the synthetic weight coefficient through the user interface input with in the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability at least one.
More than, enumerate preferred example and mode and describe the present invention, but the present invention is not limited in said execution mode form and mode, can in the scope of its technical thought, carry out various distortion and implement.
The priority that Japanese patent application 2008-72972 number of advocating to file an application with on March 21st, 2008 of the application is the basis is incorporated herein its whole disclosed contents.
Utilizability on the industry
According to the present invention, can be used as a kind of image processing apparatus, this image processing apparatus is to utilize the image processing apparatus of using through the various image processing of interlacing-change the line by line progressive picture that generates.

Claims (17)

1. an image processing method is characterized in that comprising the steps:
Through the first interpolation reliability, the second interpolation reliability and the 3rd interpolation reliability is comprehensive, decide interpolation reliability through the inter polated pixel that interlaced picture is carried out the progressive picture that interpolation generates, wherein,
Difference absolute value according to pixel employed, up in the calculating of the value of the pixel of carrying out interpolation and descending pixel decides the said first interpolation reliability,
According to employed in the calculating of the value of said pixel of carrying out interpolation, in order to determine the width in the zone that up pixel and descending pixel are used, decide the said second interpolation reliability,
Change the pattern of the combination that changes with descending brightness according to the up brightness in the said zone, decide said the 3rd interpolation reliability.
2. image processing method as claimed in claim 1 is characterized in that:
The more little then said first interpolation reliability of said difference absolute value has big more value, and the bigger then said first interpolation reliability of said difference absolute value has more little value.
3. image processing method as claimed in claim 1 is characterized in that:
The wide more then said second interpolation reliability in said zone has big more value, and the narrow more then said second interpolation reliability in said zone has more little value.
4. image processing method as claimed in claim 1 is characterized in that:
The pattern that pattern that up brightness changes and descending brightness change is similar more, and then said the 3rd interpolation reliability has big more value.
5. image processing method as claimed in claim 1 is characterized in that:
The pattern that pattern that said up brightness changes and descending brightness change is simple more; Then said the 3rd interpolation reliability has big more value; The pattern that pattern that said up brightness changes and descending brightness change is more complicated, and then said the 3rd interpolation reliability has more little value.
6. image processing method as claimed in claim 1 is characterized in that:
Change the pattern of the combination that changes with descending brightness as the up brightness in the said zone, use following four kinds of patterns: a side is smooth, on same direction, increase or reduce, to same direction protrusion, side's increase or minimizing and the opposing party is protruded.
7. image processing method as claimed in claim 1 is characterized in that:
The said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability when comprehensive, are being utilized the synthetic weight coefficient through the user interface input.
8. image processing method is characterized in that having:
The picture interpolation step in this step, is carried out interpolation to interlaced picture and is generated progressive picture;
The first interpolation reliability calculation procedure; In the said first interpolation reliability calculation procedure; Calculate the first interpolation reliability of inter polated pixel, this first interpolation reliability decides according to the difference absolute value of pixel employed, up in the calculating of the value of the pixel of carrying out interpolation and descending pixel;
The second interpolation reliability calculation procedure and the 3rd interpolation reliability calculation procedure; Wherein, In the said second interpolation reliability calculation procedure; Calculate the second interpolation reliability of inter polated pixel, this second interpolation reliability according to employed in the calculating of the value of said pixel of carrying out interpolation, decide for the width that determines the zone that up pixel and descending pixel are used; In said the 3rd interpolation reliability calculation procedure, calculate the 3rd interpolation reliability of inter polated pixel, the 3rd interpolation reliability decides according to the pattern that the up brightness in the said zone changes the combination that changes with descending brightness; With
The comprehensive step of interpolation reliability, the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability is comprehensive, calculate the interpolation reliability of inter polated pixel.
9. image processing method as claimed in claim 8 is characterized in that:
Carry out said second interpolation reliability calculation procedure and said the 3rd interpolation reliability calculation procedure, the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability is comprehensive.
10. image processing apparatus is characterized in that having:
The first interpolation reliability calculator; This first interpolation reliability calculator calculates the first interpolation reliability of inter polated pixel, and this first interpolation reliability decides according to the difference absolute value of pixel employed, up in the calculating of the value of the inter polated pixel of the progressive picture that generates through the interpolation interlaced picture and descending pixel;
The second interpolation reliability calculator and the 3rd interpolation reliability calculator; The said second interpolation reliability calculator calculates the second interpolation reliability of inter polated pixel, this second interpolation reliability according to employed in the calculating of the value of said inter polated pixel, decide for the width that determines the zone that up pixel and descending pixel are used; Said the 3rd interpolation reliability calculator calculates the 3rd interpolation reliability of inter polated pixel, and the 3rd interpolation reliability decides according to the pattern that the up brightness in the said zone changes the combination that changes with descending brightness; With
Interpolation reliability comprehensive unit, it is comprehensive with the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability, calculates the interpolation reliability of inter polated pixel.
11. image processing apparatus as claimed in claim 10 is characterized in that:
This image processing apparatus has said second interpolation reliability calculator and said the 3rd interpolation reliability calculator,
Said interpolation reliability comprehensive unit is comprehensive with the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability.
12. image processing apparatus as claimed in claim 10 is characterized in that:
The said first interpolation reliability calculator calculates the said first interpolation reliability, makes the more little then said first interpolation reliability of said difference absolute value have big more value, and the bigger then said first interpolation reliability of difference absolute value has more little value.
13. image processing apparatus as claimed in claim 10 is characterized in that:
The said second interpolation reliability calculator calculates the said second interpolation reliability, makes the wide more then said second interpolation reliability in said zone have big more value, and the narrow more then said second interpolation reliability in said zone has more little value.
14. image processing apparatus as claimed in claim 10 is characterized in that:
Said the 3rd interpolation reliability calculator calculates said the 3rd interpolation reliability, makes pattern that up brightness changes similar more with the pattern of descending brightness variation, and then said the 3rd interpolation reliability has big more value.
15. image processing apparatus as claimed in claim 10 is characterized in that:
Said the 3rd interpolation reliability calculator calculates said the 3rd interpolation reliability; The pattern that makes pattern that said up brightness changes and descending brightness change is simple more; Then said the 3rd interpolation reliability has big more value; The pattern that pattern that said up brightness changes and descending brightness change is more complicated, and then said the 3rd interpolation reliability has more little value.
16. image processing apparatus as claimed in claim 10 is characterized in that:
Said the 3rd interpolation reliability calculator uses following four kinds of patterns to change the pattern of the combination that changes with descending brightness as the up brightness in the said zone: a side is smooth, on same direction, increase or reduce, to same direction protrusion, side's increase or minimizing and the opposing party is protruded.
17. image processing apparatus as claimed in claim 10 is characterized in that:
Said interpolation reliability comprehensive unit when comprehensive, is utilizing the synthetic weight coefficient through the user interface input with the said first interpolation reliability, the said second interpolation reliability and said the 3rd interpolation reliability.
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